Nut-lock.



T. P. MAY. n f NUT LOCK.

, I PYLIQATIOH FILED APLZB, 1908. i' i 994,528. Patented June 6,1911.'

lnllnllllllllln W w@ Arm/mers secured by a bolt provided with4 my` imin the locking position.- Fig. 5 includes dia- .axial bore l, which is threadedto the right and in its outer face it is provided with a .30

v opposite direction, and lwhich is enlarged class of nuts locked 'by-means'o'f a smaller drawing in which-f 15.

'constructed with a reduced boss or tenon 3,

formed eccentric with the bore l, corre- .UNTTED STATES PATENT OFFICE.

T HoMAs FOLEY MAfY, 0E LEHI, UTAH.

NUT-Loox.

To all whom 'it may concrn: Be it known that I, TnoMAs- FOLEY MAY, a citizen of the United States, and a resident of Lehi, in the county 'of Utah 'and State of Utah, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.'

My invention is an improvement in the j am nut.

The details -of construction, arrangement and combination of parts are as hereinafter described and shown in the accompanying Figure 1 is a vertical cross section of a railroad rail provided' with fish plates proved nut-lock. Fig. 2 is a longitudinal nut inthe locking position. Fig. 8 includes an inner face-view of the boltnut, and a I A l limited movement or rotationof the jam side View. of thejam, or locking nut. Fig. 4 is an end viewl ofthe main and lock nuts grammatic views of the inner faces of the i bolt and lock nuts. .i

The polygonal or main bolt-nut A has an recess or'socket 2, which is threaded in the and also formed eccentrically with relation to the central bore and the perimeter of the'j nut. f v

"The jam, or locking; nut B has a central bore 1, which is threaded to theright, cor.-v responding withjthe threaded bore of'the main or bolt nut A. The'said jam nut is which is threaded tothe left and also sponding in this rrespect to thek threaded socket 2. The' jam-nut B is provided with a series ofsides corresponding with the bolt nut A. When the jam nut has been screwed into the main or bolt nut A, and the latter Specication of Letters Patent. Applicatio'nled April 25, 1908'. Serial No. 429,204.

is turned home on the bolt C, as shown in f Fig. 1, the nuimay be locked by turning the Patented June jam nutB to the ri t or left, but preferably to the left, by which operation the eccentric portionof the jam nut effects the desired lock. In other words, the eccentricity of the tenon 3 ofthe jam nut, and the socket 2 of the bolt nut causes ythe thread 1l of the jam nut to be wedged upon or jam'with the thread of the bolt. To ei'ectl such lock it is only necessary to turn the jam nut a small portion of a revolution, or to the position indicated in Fig. 4, where the sides of the jam nut are shown out of coincidence with those of the bolt nut.

l lIt will be understood thatir Fig. 1, the bolt'nut A and jam nut B 4are not in a locking position, and that the jam nut requires to be turned but a fraction of a revolution to the right or left in order to be locked in the said position as indicated in Fig. 4. It f is' apparent that `the locking of the bolt nut may be easily and quickly eii'ected by nut B, and that the same`may/also beeasily released by simply turning the jam nut B back ,to the normal position in which its sides correspond with those of the bolt nut,4

las shown vin Fig.- 1. Bothy bolts A, B, may vbe then screwed on or o together.

The enlarged threads on the boss'or tenon it to work in harmony with threads of the aXle bore, and hence a jamresults whenth'e parts` are screwed up, and at the sameA time ing the same form, one wrench of fixed adjust-ment serves to screw them both home, or to remove both from the nut. Not only does one wrench serveto put on and take oif the nut, but in addition it holds the bores of the, main p and. lock nut 'i in alinement, while both are being put on and removed from vthe bolt, thus preventing the locked nut .of the lockingnut cannot of course enable I thus secure a firmer lock"l than* from turning so as to bring its axial bore-L.

out of alinement with that of the bolt nut. and the jam nut, the threads of which are of 10 The same adjusted wrench will also serve to opposite incline `tothose of the bore, the set the lock nnt.V g. socket and tenon being eccentric to lthe bolt What I claim isfopening.

5 In combination, a threaded bolt, a main nut having a threaded bore "which ts the bolt, a jam nut having a threaded bore Witnesses: which ts the bolt, and a socket and tenon D. W. AMMERMAN, threaded engagement between the main nut J. W. BAIN.

THos. FOLEY MAY. 

